Future autonomous features

While in for the SW recall with my 2017 w/ACC, I noticed another driver with a gen1 Volt that had the mobileye camera installed. I wasn't aware that some gen1 cars had lane keeping so I asked him about it and he clarified it was lane departure warning only.

I'm fascinated by the prospects going forward... If some pre-2016 cars had lane departure warning and 2016+ have optional lane keeping (err, nudging) I'm wondering at what point the Volt (and probably Bolt) will have actual old style Tesla highway 'autopilot'? Perhaps even auto-lane switching although that might require side cameras.. not sure if the SBZ detectors would be sufficient.

No doubt at a minimum this would require a lot more processing (and software) and perhaps even a better camera (not sure of the specs on the existing cam). But it wouldn't be too hard to predict this coming to the Volt/Bolt in the near future.

I guess my real question would be: Does anyone think existing ACC cars would be offered a camera/processor upgrade to enable some of these features? Doesn't sound like GM style to offer such upgrades and I guess it might require some UI rewriting as well.. Just curious.